For sophisticated reinforcement learning (RL) systems to interact usefully with real-world environments, we need to communicate complex goals to these systems. In this work, we explore goals defined in terms of (non-expert) human preferences between pairs of trajectory segments. We show that this approach can effectively solve complex RL tasks without access to the reward function, including Atari games and simulated robot locomotion, while providing feedback on less than one percent of our agent's interactions with the environment. This reduces the cost of human oversight far enough that it can be practically applied to state-of-the-art RL systems. To demonstrate the flexibility of our approach, we show that we can successfully train complex novel behaviors with about an hour of human time. These behaviors and environments are considerably more complex than any that have been previously learned from human feedback.

本文研究了使用非专家人类偏好来定义复杂目标的强化学习系统的方法，并且证明此方法可实现许多复杂的强化学习任务，包括 Atari 游戏和模拟机器人，同时也大幅降低了人类监督成本，以及展示了本方法的灵活性，并可成功使用较短时间完成复杂的新颖行为的训练，同时也采用了前人的人类反馈信息和环境。

深度强化学习从人类偏好中学习